I am not against prefilling.I found out they make small engine funnels that they sell at walmart. They're skinny and tall so you can actually add oil thru the dipstick tube easily on a mower. Anyways, I noticed these funnels also have about the smallest diameter hole i've seen yet on a funnel, so imo these would work great for pre filling an oil filter through the small holes so the oil is actually filtered first instead of just dumping it through the large center hole where it's unfiltered like me and i'm sure most everyone else does too. Opinions? Just thought i'd help
But what you are proposing is not really worth the hassle. Just pour in the center, pause, pour a bit more in. Done.
New oil in a bottle does not need to be filtered.